map()

Transform each upstream DATA value with a synchronous mapping function.

Import

import { map } from "@graphrefly/ts/operators";

Signature

function map(fn: ((v: S) => T) | Definition<S, T>): Operator<S, T>

Parameters

Parameter	Type	Description
fn	((v: S) => T) | Definition<S, T>	Mapping function, or a named define() definition for checkpoint restoration.

Returns

An operator that emits fn(value) for each upstream value.

Example

import { graph } from "@graphrefly/ts/graph";
import { map } from "@graphrefly/ts/operators";

const g = graph();
const count = g.state(1);
const doubled = g.initNode(map((value: number) => value * 2), [count]);

Remarks

• Restorable maps: Passing a named define() registers semantic restore metadata.

Source

packages/ts/src/graph/operators.ts